What icon best suits browser push notifications? [on hold]

I have been searching for an icon to use for push notifications.I cannot use the usual notification bell icon since it will be used in notification parts in the app. A mobile notification icon can also not be used since push notifications can appear in both desktop and mobile devices. A usual conversation bubble is what i came closest to , but will still confuse the user.

What icon suits the push notifications the best ?

These are few icon I came across.